The more the merrier.
I honestly do not know about Gravity Rush or this Kat person, but if a fun experience is waiting for us in this game I say, "Who gives a **bleep**."
You forgot to take the safety off, rookie.
She's my most wanted female character that is likely to be in the game. Like...I want her in over Nariko and Fat Princess at least. However...now that I think about it...I want Lara and Yorda in there as well. To be fair, though, I want Lara in just for the sake of her iconic status with the Playstation console. She might be too similar to Nathan Drake for me to be super interested. But...it still feels like she deserves a spot. But...yeah. Over all...if Kat was in...I could see her not only being a great addition for repping the vita and this new generation...but for the sake of being incredibly interesting gameplay-wise.